Overview
Brought to you by YData
Dataset statistics
| Number of variables | 12 |
|---|---|
| Number of observations | 149010 |
| Missing cells | 74 |
| Missing cells (%) | < 0.1% |
| Duplicate rows | 0 |
| Duplicate rows (%) | 0.0% |
| Total size in memory | 13.6 MiB |
| Average record size in memory | 96.0 B |
Variable types
| Text | 2 |
|---|---|
| Numeric | 8 |
| Categorical | 2 |
crawling_date has constant value "20241130" | Constant |
avg_rating is highly overall correlated with num_of_ratings and 1 other fields | High correlation |
num_of_enrolled is highly overall correlated with num_of_ratings and 2 other fields | High correlation |
num_of_ratings is highly overall correlated with avg_rating and 3 other fields | High correlation |
num_of_reviews is highly overall correlated with avg_rating and 3 other fields | High correlation |
num_of_top_instructor_courses is highly overall correlated with num_of_top_instructor_leaners | High correlation |
num_of_top_instructor_leaners is highly overall correlated with num_of_enrolled and 3 other fields | High correlation |
Rating is highly imbalanced (62.4%) | Imbalance |
helpfulness is highly skewed (γ1 = 44.41021962) | Skewed |
helpfulness has 143141 (96.1%) zeros | Zeros |
Reproduction
| Analysis started | 2025-01-14 13:53:22.358392 |
|---|---|
| Analysis finished | 2025-01-14 13:53:34.002490 |
| Duration | 11.64 seconds |
| Software version | ydata-profiling vv4.12.1 |
| Download configuration | config.json |
Variables
course_name
Text
| Distinct | 205 |
|---|---|
| Distinct (%) | 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Memory size | 1.1 MiB |
Length
| Max length | 79 |
|---|---|
| Median length | 56 |
| Mean length | 21.456265 |
| Min length | 2 |
Unique
| Unique | 1 ? |
|---|---|
| Unique (%) | < 0.1% |
Sample
| 1st row | foundations-of-cybersecurity |
|---|---|
| 2nd row | foundations-of-cybersecurity |
| 3rd row | foundations-of-cybersecurity |
| 4th row | foundations-of-cybersecurity |
| 5th row | foundations-of-cybersecurity |
| Value | Count | Frequency (%) |
| foundations-user-experience-design | 9969 | 6.7% |
| python | 9965 | 6.7% |
| python-data | 9964 | 6.7% |
| python-network-data | 7094 | 4.8% |
| html | 6583 | 4.4% |
| foundations-of-cybersecurity | 5492 | 3.7% |
| html-css-javascript-for-web-developers | 4123 | 2.8% |
| matlab | 4010 | 2.7% |
| introduction-tensorflow | 3800 | 2.6% |
| python-basics | 3779 | 2.5% |
| Other values (195) | 84231 |
Most occurring characters
| Value | Count | Frequency (%) |
| - | 295263 | 9.2% |
| e | 272013 | 8.5% |
| t | 269558 | 8.4% |
| o | 251923 | 7.9% |
| n | 240195 | 7.5% |
| a | 213816 | 6.7% |
| r | 204506 | 6.4% |
| i | 200749 | 6.3% |
| s | 179616 | 5.6% |
| d | 128571 | 4.0% |
| Other values (20) | 940988 |
Most occurring categories
| Value | Count | Frequency (%) |
| (unknown) | 3197198 |
Most frequent character per category
(unknown)
| Value | Count | Frequency (%) |
| - | 295263 | 9.2% |
| e | 272013 | 8.5% |
| t | 269558 | 8.4% |
| o | 251923 | 7.9% |
| n | 240195 | 7.5% |
| a | 213816 | 6.7% |
| r | 204506 | 6.4% |
| i | 200749 | 6.3% |
| s | 179616 | 5.6% |
| d | 128571 | 4.0% |
| Other values (20) | 940988 |
Most occurring scripts
| Value | Count | Frequency (%) |
| (unknown) | 3197198 |
Most frequent character per script
(unknown)
| Value | Count | Frequency (%) |
| - | 295263 | 9.2% |
| e | 272013 | 8.5% |
| t | 269558 | 8.4% |
| o | 251923 | 7.9% |
| n | 240195 | 7.5% |
| a | 213816 | 6.7% |
| r | 204506 | 6.4% |
| i | 200749 | 6.3% |
| s | 179616 | 5.6% |
| d | 128571 | 4.0% |
| Other values (20) | 940988 |
Most occurring blocks
| Value | Count | Frequency (%) |
| (unknown) | 3197198 |
Most frequent character per block
(unknown)
| Value | Count | Frequency (%) |
| - | 295263 | 9.2% |
| e | 272013 | 8.5% |
| t | 269558 | 8.4% |
| o | 251923 | 7.9% |
| n | 240195 | 7.5% |
| a | 213816 | 6.7% |
| r | 204506 | 6.4% |
| i | 200749 | 6.3% |
| s | 179616 | 5.6% |
| d | 128571 | 4.0% |
| Other values (20) | 940988 |
posted_date
Real number (ℝ)
| Distinct | 3382 |
|---|---|
| Distinct (%) | 2.3% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 20207571 |
| Minimum | 20150813 |
|---|---|
| Maximum | 20241201 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 20150813 |
|---|---|
| 5-th percentile | 20170124 |
| Q1 | 20200422 |
| median | 20201212 |
| Q3 | 20221115 |
| 95-th percentile | 20240613 |
| Maximum | 20241201 |
| Range | 90388 |
| Interquartile range (IQR) | 20693 |
Descriptive statistics
| Standard deviation | 21029.923 |
|---|---|
| Coefficient of variation (CV) | 0.0010406952 |
| Kurtosis | -0.21332427 |
| Mean | 20207571 |
| Median Absolute Deviation (MAD) | 18906 |
| Skewness | -0.40985919 |
| Sum | 3.0111302 × 1012 |
| Variance | 4.4225766 × 108 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=50)
| Value | Count | Frequency (%) |
| 20200531 | 292 | 0.2% |
| 20200530 | 282 | 0.2% |
| 20200601 | 281 | 0.2% |
| 20200525 | 273 | 0.2% |
| 20200518 | 273 | 0.2% |
| 20200511 | 273 | 0.2% |
| 20200512 | 271 | 0.2% |
| 20200713 | 269 | 0.2% |
| 20200516 | 267 | 0.2% |
| 20200608 | 266 | 0.2% |
| Other values (3372) | 146263 |
| Value | Count | Frequency (%) |
| 20150813 | 1 | |
| 20150815 | 2 | |
| 20150818 | 1 | |
| 20150819 | 1 | |
| 20150820 | 1 | |
| 20150826 | 1 | |
| 20150827 | 1 | |
| 20150828 | 1 | |
| 20150831 | 2 | |
| 20150903 | 1 |
| Value | Count | Frequency (%) |
| 20241201 | 1 | < 0.1% |
| 20241130 | 22 | |
| 20241129 | 31 | |
| 20241128 | 34 | |
| 20241127 | 27 | |
| 20241126 | 34 | |
| 20241125 | 45 | |
| 20241124 | 41 | |
| 20241123 | 42 | |
| 20241122 | 42 |
crawling_date
Categorical
Constant
| Distinct | 1 |
|---|---|
| Distinct (%) | < 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Memory size | 1.1 MiB |
| 20241130 |
|---|
Length
| Max length | 8 |
|---|---|
| Median length | 8 |
| Mean length | 8 |
| Min length | 8 |
Unique
| Unique | 0 ? |
|---|---|
| Unique (%) | 0.0% |
Sample
| 1st row | 20241130 |
|---|---|
| 2nd row | 20241130 |
| 3rd row | 20241130 |
| 4th row | 20241130 |
| 5th row | 20241130 |
Common Values
| Value | Count | Frequency (%) |
| 20241130 | 149010 |
Length
Histogram of lengths of the category
Common Values (Plot)
| Value | Count | Frequency (%) |
| 20241130 | 149010 |
Most occurring characters
| Value | Count | Frequency (%) |
| 2 | 298020 | |
| 0 | 298020 | |
| 1 | 298020 | |
| 4 | 149010 | |
| 3 | 149010 |
Most occurring categories
| Value | Count | Frequency (%) |
| (unknown) | 1192080 |
Most frequent character per category
(unknown)
| Value | Count | Frequency (%) |
| 2 | 298020 | |
| 0 | 298020 | |
| 1 | 298020 | |
| 4 | 149010 | |
| 3 | 149010 |
Most occurring scripts
| Value | Count | Frequency (%) |
| (unknown) | 1192080 |
Most frequent character per script
(unknown)
| Value | Count | Frequency (%) |
| 2 | 298020 | |
| 0 | 298020 | |
| 1 | 298020 | |
| 4 | 149010 | |
| 3 | 149010 |
Most occurring blocks
| Value | Count | Frequency (%) |
| (unknown) | 1192080 |
Most frequent character per block
(unknown)
| Value | Count | Frequency (%) |
| 2 | 298020 | |
| 0 | 298020 | |
| 1 | 298020 | |
| 4 | 149010 | |
| 3 | 149010 |
Rating
Categorical
Imbalance
| Distinct | 5 |
|---|---|
| Distinct (%) | < 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Memory size | 1.1 MiB |
| 5 | |
|---|---|
| 4 | |
| 3 | 4580 |
| 2 | 1467 |
| 1 | 1240 |
Length
| Max length | 1 |
|---|---|
| Median length | 1 |
| Mean length | 1 |
| Min length | 1 |
Unique
| Unique | 0 ? |
|---|---|
| Unique (%) | 0.0% |
Sample
| 1st row | 5 |
|---|---|
| 2nd row | 5 |
| 3rd row | 5 |
| 4th row | 5 |
| 5th row | 5 |
Common Values
| Value | Count | Frequency (%) |
| 5 | 123434 | |
| 4 | 18289 | 12.3% |
| 3 | 4580 | 3.1% |
| 2 | 1467 | 1.0% |
| 1 | 1240 | 0.8% |
Length
Histogram of lengths of the category
Common Values (Plot)
| Value | Count | Frequency (%) |
| 5 | 123434 | |
| 4 | 18289 | 12.3% |
| 3 | 4580 | 3.1% |
| 2 | 1467 | 1.0% |
| 1 | 1240 | 0.8% |
Most occurring characters
| Value | Count | Frequency (%) |
| 5 | 123434 | |
| 4 | 18289 | 12.3% |
| 3 | 4580 | 3.1% |
| 2 | 1467 | 1.0% |
| 1 | 1240 | 0.8% |
Most occurring categories
| Value | Count | Frequency (%) |
| (unknown) | 149010 |
Most frequent character per category
(unknown)
| Value | Count | Frequency (%) |
| 5 | 123434 | |
| 4 | 18289 | 12.3% |
| 3 | 4580 | 3.1% |
| 2 | 1467 | 1.0% |
| 1 | 1240 | 0.8% |
Most occurring scripts
| Value | Count | Frequency (%) |
| (unknown) | 149010 |
Most frequent character per script
(unknown)
| Value | Count | Frequency (%) |
| 5 | 123434 | |
| 4 | 18289 | 12.3% |
| 3 | 4580 | 3.1% |
| 2 | 1467 | 1.0% |
| 1 | 1240 | 0.8% |
Most occurring blocks
| Value | Count | Frequency (%) |
| (unknown) | 149010 |
Most frequent character per block
(unknown)
| Value | Count | Frequency (%) |
| 5 | 123434 | |
| 4 | 18289 | 12.3% |
| 3 | 4580 | 3.1% |
| 2 | 1467 | 1.0% |
| 1 | 1240 | 0.8% |
avg_rating
Real number (ℝ)
High correlation
| Distinct | 12 |
|---|---|
| Distinct (%) | < 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 4.7422797 |
| Minimum | 3.8 |
|---|---|
| Maximum | 4.9 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 3.8 |
|---|---|
| 5-th percentile | 4.6 |
| Q1 | 4.7 |
| median | 4.8 |
| Q3 | 4.8 |
| 95-th percentile | 4.9 |
| Maximum | 4.9 |
| Range | 1.1 |
| Interquartile range (IQR) | 0.1 |
Descriptive statistics
| Standard deviation | 0.10447842 |
|---|---|
| Coefficient of variation (CV) | 0.022031265 |
| Kurtosis | 4.1711331 |
| Mean | 4.7422797 |
| Median Absolute Deviation (MAD) | 0.1 |
| Skewness | -1.339126 |
| Sum | 706647.1 |
| Variance | 0.010915741 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=12)
| Value | Count | Frequency (%) |
| 4.8 | 70554 | |
| 4.7 | 40441 | |
| 4.6 | 18590 | 12.5% |
| 4.9 | 13362 | 9.0% |
| 4.5 | 3808 | 2.6% |
| 4.4 | 1444 | 1.0% |
| 4.3 | 624 | 0.4% |
| 4.1 | 68 | < 0.1% |
| 4 | 44 | < 0.1% |
| 3.9 | 40 | < 0.1% |
| Other values (2) | 35 | < 0.1% |
| Value | Count | Frequency (%) |
| 3.8 | 8 | < 0.1% |
| 3.9 | 40 | < 0.1% |
| 4 | 44 | < 0.1% |
| 4.1 | 68 | < 0.1% |
| 4.2 | 27 | < 0.1% |
| 4.3 | 624 | 0.4% |
| 4.4 | 1444 | 1.0% |
| 4.5 | 3808 | 2.6% |
| 4.6 | 18590 | |
| 4.7 | 40441 |
| Value | Count | Frequency (%) |
| 4.9 | 13362 | 9.0% |
| 4.8 | 70554 | |
| 4.7 | 40441 | |
| 4.6 | 18590 | 12.5% |
| 4.5 | 3808 | 2.6% |
| 4.4 | 1444 | 1.0% |
| 4.3 | 624 | 0.4% |
| 4.2 | 27 | < 0.1% |
| 4.1 | 68 | < 0.1% |
| 4 | 44 | < 0.1% |
num_of_ratings
Real number (ℝ)
High correlation
| Distinct | 193 |
|---|---|
| Distinct (%) | 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 36113.824 |
| Minimum | 13 |
|---|---|
| Maximum | 229752 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 13 |
|---|---|
| 5-th percentile | 1170 |
| Q1 | 3661 |
| median | 13222 |
| Q3 | 27905 |
| 95-th percentile | 229752 |
| Maximum | 229752 |
| Range | 229739 |
| Interquartile range (IQR) | 24244 |
Descriptive statistics
| Standard deviation | 58225.838 |
|---|---|
| Coefficient of variation (CV) | 1.6122867 |
| Kurtosis | 5.3098371 |
| Mean | 36113.824 |
| Median Absolute Deviation (MAD) | 10265 |
| Skewness | 2.45854 |
| Sum | 5.381321 × 109 |
| Variance | 3.3902482 × 109 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=50)
| Value | Count | Frequency (%) |
| 69498 | 9969 | 6.7% |
| 229752 | 9965 | 6.7% |
| 96077 | 9964 | 6.7% |
| 44178 | 7094 | 4.8% |
| 27564 | 6583 | 4.4% |
| 27905 | 5492 | 3.7% |
| 16672 | 4123 | 2.8% |
| 17700 | 4010 | 2.7% |
| 19521 | 3800 | 2.6% |
| 17773 | 3779 | 2.5% |
| Other values (183) | 84231 |
| Value | Count | Frequency (%) |
| 13 | 1 | < 0.1% |
| 19 | 6 | < 0.1% |
| 24 | 24 | |
| 28 | 8 | < 0.1% |
| 30 | 9 | < 0.1% |
| 39 | 18 | |
| 41 | 10 | |
| 42 | 13 | |
| 52 | 11 | |
| 55 | 11 |
| Value | Count | Frequency (%) |
| 229752 | 9965 | |
| 96077 | 9964 | |
| 69498 | 9969 | |
| 44178 | 7094 | |
| 27905 | 5492 | |
| 27564 | 6583 | |
| 21320 | 2691 | 1.8% |
| 19521 | 3800 | 2.6% |
| 17773 | 3779 | 2.5% |
| 17700 | 4010 |
helpfulness
Real number (ℝ)
Skewed Zeros
| Distinct | 78 |
|---|---|
| Distinct (%) | 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 0.15433192 |
| Minimum | 0 |
|---|---|
| Maximum | 239 |
| Zeros | 143141 |
| Zeros (%) | 96.1% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 0 |
|---|---|
| 5-th percentile | 0 |
| Q1 | 0 |
| median | 0 |
| Q3 | 0 |
| 95-th percentile | 0 |
| Maximum | 239 |
| Range | 239 |
| Interquartile range (IQR) | 0 |
Descriptive statistics
| Standard deviation | 2.0058198 |
|---|---|
| Coefficient of variation (CV) | 12.996791 |
| Kurtosis | 3241.1155 |
| Mean | 0.15433192 |
| Median Absolute Deviation (MAD) | 0 |
| Skewness | 44.41022 |
| Sum | 22997 |
| Variance | 4.0233129 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=50)
| Value | Count | Frequency (%) |
| 0 | 143141 | |
| 1 | 3306 | 2.2% |
| 2 | 809 | 0.5% |
| 3 | 388 | 0.3% |
| 4 | 282 | 0.2% |
| 5 | 184 | 0.1% |
| 6 | 141 | 0.1% |
| 7 | 97 | 0.1% |
| 8 | 89 | 0.1% |
| 9 | 82 | 0.1% |
| Other values (68) | 491 | 0.3% |
| Value | Count | Frequency (%) |
| 0 | 143141 | |
| 1 | 3306 | 2.2% |
| 2 | 809 | 0.5% |
| 3 | 388 | 0.3% |
| 4 | 282 | 0.2% |
| 5 | 184 | 0.1% |
| 6 | 141 | 0.1% |
| 7 | 97 | 0.1% |
| 8 | 89 | 0.1% |
| 9 | 82 | 0.1% |
| Value | Count | Frequency (%) |
| 239 | 1 | |
| 202 | 1 | |
| 144 | 1 | |
| 138 | 1 | |
| 136 | 1 | |
| 118 | 1 | |
| 114 | 1 | |
| 111 | 1 | |
| 108 | 2 | |
| 99 | 2 |
Review_Text
Text
| Distinct | 125712 |
|---|---|
| Distinct (%) | 84.4% |
| Missing | 74 |
| Missing (%) | < 0.1% |
| Memory size | 1.1 MiB |
Length
| Max length | 6153 |
|---|---|
| Median length | 2287 |
| Mean length | 112.88996 |
| Min length | 1 |
Unique
| Unique | 122712 ? |
|---|---|
| Unique (%) | 82.4% |
Sample
| 1st row | The course is well paced and they get you comfortable with the topics even though we do not have any sort of prior exposure in this field. It is very good for the beginners who are new to this field |
|---|---|
| 2nd row | Information was well organized, easy to learn, and study. with frequent note writing, and some breaks . You can learn a good brief summary of what's to come, and what to research more in the future. |
| 3rd row | For a foundation course, this one was easy to understand, it explained all basic concepts in a fluid way and built up the base for the upcoming courses. I'm eager to move on to the other courses now. |
| 4th row | I think this is a great start for anyone who is starting from absolute zero. I think that since I've been toying with the idea of getting into Cybersecurity for 2 years now, it was a great refresher! |
| 5th row | Surprised by the quality of this course. repeating items so you learn by seeing definitions and concepts over and over again while using great analogy to make difficult concept understandable. |
| Value | Count | Frequency (%) |
| the | 128039 | 4.5% |
| course | 97382 | 3.4% |
| and | 94042 | 3.3% |
| to | 93213 | 3.3% |
| a | 66977 | 2.4% |
| i | 64719 | 2.3% |
| of | 51245 | 1.8% |
| this | 48652 | 1.7% |
| is | 45538 | 1.6% |
| for | 43044 | 1.5% |
| Other values (56150) | 2113697 |
Most occurring characters
| Value | Count | Frequency (%) |
| 2709398 | ||
| e | 1665893 | 9.9% |
| t | 1115271 | 6.6% |
| o | 1085929 | 6.5% |
| a | 984816 | 5.9% |
| n | 938406 | 5.6% |
| r | 895340 | 5.3% |
| s | 881626 | 5.2% |
| i | 854155 | 5.1% |
| l | 573398 | 3.4% |
| Other values (136) | 5109147 |
Most occurring categories
| Value | Count | Frequency (%) |
| (unknown) | 16813379 |
Most frequent character per category
(unknown)
| Value | Count | Frequency (%) |
| 2709398 | ||
| e | 1665893 | 9.9% |
| t | 1115271 | 6.6% |
| o | 1085929 | 6.5% |
| a | 984816 | 5.9% |
| n | 938406 | 5.6% |
| r | 895340 | 5.3% |
| s | 881626 | 5.2% |
| i | 854155 | 5.1% |
| l | 573398 | 3.4% |
| Other values (136) | 5109147 |
Most occurring scripts
| Value | Count | Frequency (%) |
| (unknown) | 16813379 |
Most frequent character per script
(unknown)
| Value | Count | Frequency (%) |
| 2709398 | ||
| e | 1665893 | 9.9% |
| t | 1115271 | 6.6% |
| o | 1085929 | 6.5% |
| a | 984816 | 5.9% |
| n | 938406 | 5.6% |
| r | 895340 | 5.3% |
| s | 881626 | 5.2% |
| i | 854155 | 5.1% |
| l | 573398 | 3.4% |
| Other values (136) | 5109147 |
Most occurring blocks
| Value | Count | Frequency (%) |
| (unknown) | 16813379 |
Most frequent character per block
(unknown)
| Value | Count | Frequency (%) |
| 2709398 | ||
| e | 1665893 | 9.9% |
| t | 1115271 | 6.6% |
| o | 1085929 | 6.5% |
| a | 984816 | 5.9% |
| n | 938406 | 5.6% |
| r | 895340 | 5.3% |
| s | 881626 | 5.2% |
| i | 854155 | 5.1% |
| l | 573398 | 3.4% |
| Other values (136) | 5109147 |
num_of_reviews
Real number (ℝ)
High correlation
| Distinct | 178 |
|---|---|
| Distinct (%) | 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 3920.0919 |
| Minimum | 1 |
|---|---|
| Maximum | 10000 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 1 |
|---|---|
| 5-th percentile | 208 |
| Q1 | 836 |
| median | 2698 |
| Q3 | 6623 |
| 95-th percentile | 10000 |
| Maximum | 10000 |
| Range | 9999 |
| Interquartile range (IQR) | 5787 |
Descriptive statistics
| Standard deviation | 3604.5532 |
|---|---|
| Coefficient of variation (CV) | 0.91950733 |
| Kurtosis | -1.0444175 |
| Mean | 3920.0919 |
| Median Absolute Deviation (MAD) | 2112 |
| Skewness | 0.70156583 |
| Sum | 5.841329 × 108 |
| Variance | 12992804 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=50)
| Value | Count | Frequency (%) |
| 10000 | 29898 | 20.1% |
| 7113 | 7094 | 4.8% |
| 6623 | 6583 | 4.4% |
| 5510 | 5492 | 3.7% |
| 4131 | 4123 | 2.8% |
| 4032 | 4010 | 2.7% |
| 3809 | 3800 | 2.6% |
| 3784 | 3779 | 2.5% |
| 2854 | 2851 | 1.9% |
| 2779 | 2748 | 1.8% |
| Other values (168) | 78632 |
| Value | Count | Frequency (%) |
| 1 | 1 | < 0.1% |
| 2 | 2 | < 0.1% |
| 5 | 5 | < 0.1% |
| 6 | 6 | < 0.1% |
| 7 | 7 | < 0.1% |
| 8 | 40 | |
| 9 | 27 | |
| 10 | 30 | |
| 11 | 22 | |
| 12 | 12 | < 0.1% |
| Value | Count | Frequency (%) |
| 10000 | 29898 | |
| 7113 | 7094 | 4.8% |
| 6623 | 6583 | 4.4% |
| 5510 | 5492 | 3.7% |
| 4131 | 4123 | 2.8% |
| 4032 | 4010 | 2.7% |
| 3809 | 3800 | 2.6% |
| 3784 | 3779 | 2.5% |
| 2854 | 2851 | 1.9% |
| 2779 | 2748 | 1.8% |
num_of_enrolled
Real number (ℝ)
High correlation
| Distinct | 205 |
|---|---|
| Distinct (%) | 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 676194.78 |
| Minimum | 1507 |
|---|---|
| Maximum | 3205753 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 1507 |
|---|---|
| 5-th percentile | 65412 |
| Q1 | 182631 |
| median | 408135 |
| Q3 | 988223 |
| 95-th percentile | 3205753 |
| Maximum | 3205753 |
| Range | 3204246 |
| Interquartile range (IQR) | 805592 |
Descriptive statistics
| Standard deviation | 777814.48 |
|---|---|
| Coefficient of variation (CV) | 1.1502817 |
| Kurtosis | 4.6242505 |
| Mean | 676194.78 |
| Median Absolute Deviation (MAD) | 261381 |
| Skewness | 2.22966 |
| Sum | 1.0075978 × 1011 |
| Variance | 6.0499537 × 1011 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=50)
| Value | Count | Frequency (%) |
| 1361423 | 9969 | 6.7% |
| 3205753 | 9965 | 6.7% |
| 1076350 | 9964 | 6.7% |
| 682235 | 7094 | 4.8% |
| 574559 | 6583 | 4.4% |
| 988223 | 5492 | 3.7% |
| 1171384 | 4123 | 2.8% |
| 497579 | 4010 | 2.7% |
| 385916 | 3800 | 2.6% |
| 459997 | 3779 | 2.5% |
| Other values (195) | 84231 |
| Value | Count | Frequency (%) |
| 1507 | 8 | |
| 2165 | 11 | |
| 2233 | 6 | |
| 2240 | 13 | |
| 2429 | 7 | |
| 3736 | 8 | |
| 3802 | 1 | < 0.1% |
| 4033 | 14 | |
| 5198 | 12 | |
| 5932 | 10 |
| Value | Count | Frequency (%) |
| 3205753 | 9965 | |
| 1361423 | 9969 | |
| 1171384 | 4123 | |
| 1076350 | 9964 | |
| 988223 | 5492 | |
| 682235 | 7094 | |
| 582205 | 2712 | 1.8% |
| 574559 | 6583 | |
| 540079 | 2678 | 1.8% |
| 535924 | 2259 | 1.5% |
num_of_top_instructor_courses
Real number (ℝ)
High correlation
| Distinct | 29 |
|---|---|
| Distinct (%) | < 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 112.87373 |
| Minimum | 2 |
|---|---|
| Maximum | 1675 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 2 |
|---|---|
| 5-th percentile | 4 |
| Q1 | 9 |
| median | 60 |
| Q3 | 129 |
| 95-th percentile | 325 |
| Maximum | 1675 |
| Range | 1673 |
| Interquartile range (IQR) | 120 |
Descriptive statistics
| Standard deviation | 218.42102 |
|---|---|
| Coefficient of variation (CV) | 1.9350916 |
| Kurtosis | 33.342219 |
| Mean | 112.87373 |
| Median Absolute Deviation (MAD) | 51 |
| Skewness | 5.1733414 |
| Sum | 16819315 |
| Variance | 47707.74 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=29)
| Value | Count | Frequency (%) |
| 60 | 40114 | |
| 325 | 27680 | |
| 9 | 11667 | 7.8% |
| 4 | 9246 | 6.2% |
| 129 | 8171 | 5.5% |
| 5 | 6642 | 4.5% |
| 18 | 6518 | 4.4% |
| 2 | 5113 | 3.4% |
| 8 | 5100 | 3.4% |
| 12 | 4900 | 3.3% |
| Other values (19) | 23859 |
| Value | Count | Frequency (%) |
| 2 | 5113 | |
| 3 | 849 | 0.6% |
| 4 | 9246 | |
| 5 | 6642 | |
| 6 | 1575 | 1.1% |
| 7 | 2993 | 2.0% |
| 8 | 5100 | |
| 9 | 11667 | |
| 10 | 50 | < 0.1% |
| 12 | 4900 |
| Value | Count | Frequency (%) |
| 1675 | 2059 | 1.4% |
| 325 | 27680 | |
| 196 | 92 | 0.1% |
| 129 | 8171 | 5.5% |
| 87 | 177 | 0.1% |
| 66 | 20 | < 0.1% |
| 60 | 40114 | |
| 58 | 2542 | 1.7% |
| 53 | 1525 | 1.0% |
| 48 | 12 | < 0.1% |
num_of_top_instructor_leaners
Real number (ℝ)
High correlation
| Distinct | 83 |
|---|---|
| Distinct (%) | 0.1% |
| Missing | 0 |
| Missing (%) | 0.0% |
| Infinite | 0 |
| Infinite (%) | 0.0% |
| Mean | 3635335.4 |
| Minimum | 3945 |
|---|---|
| Maximum | 11153139 |
| Zeros | 0 |
| Zeros (%) | 0.0% |
| Negative | 0 |
| Negative (%) | 0.0% |
| Memory size | 1.1 MiB |
Quantile statistics
| Minimum | 3945 |
|---|---|
| 5-th percentile | 167950 |
| Q1 | 517137 |
| median | 1245385 |
| Q3 | 4384601 |
| 95-th percentile | 11153139 |
| Maximum | 11153139 |
| Range | 11149194 |
| Interquartile range (IQR) | 3867464 |
Descriptive statistics
| Standard deviation | 3938852.4 |
|---|---|
| Coefficient of variation (CV) | 1.0834908 |
| Kurtosis | -0.33852548 |
| Mean | 3635335.4 |
| Median Absolute Deviation (MAD) | 1124756 |
| Skewness | 1.0469686 |
| Sum | 5.4170133 × 1011 |
| Variance | 1.5514558 × 1013 |
| Monotonicity | Not monotonic |
Histogram with fixed size bins (bins=50)
| Value | Count | Frequency (%) |
| 4384601 | 40114 | |
| 11153139 | 27680 | |
| 954353 | 8171 | 5.5% |
| 1071441 | 6272 | 4.2% |
| 517137 | 4583 | 3.1% |
| 1245385 | 4494 | 3.0% |
| 596976 | 4491 | 3.0% |
| 506004 | 4124 | 2.8% |
| 426823 | 3931 | 2.6% |
| 528545 | 3887 | 2.6% |
| Other values (73) | 41263 |
| Value | Count | Frequency (%) |
| 3945 | 8 | < 0.1% |
| 6855 | 7 | < 0.1% |
| 7841 | 22 | |
| 8506 | 44 | |
| 8682 | 8 | < 0.1% |
| 8703 | 10 | < 0.1% |
| 18193 | 24 | |
| 19837 | 20 | |
| 21526 | 45 | |
| 29959 | 45 |
| Value | Count | Frequency (%) |
| 11153139 | 27680 | |
| 4384601 | 40114 | |
| 3081791 | 1525 | 1.0% |
| 2767486 | 2059 | 1.4% |
| 1245385 | 4494 | 3.0% |
| 1071441 | 6272 | 4.2% |
| 1065753 | 92 | 0.1% |
| 1014757 | 2542 | 1.7% |
| 954353 | 8171 | 5.5% |
| 892947 | 1 | < 0.1% |
Interactions
Correlations
| Rating | avg_rating | helpfulness | num_of_enrolled | num_of_ratings | num_of_reviews | num_of_top_instructor_courses | num_of_top_instructor_leaners | posted_date | |
|---|---|---|---|---|---|---|---|---|---|
| Rating | 1.000 | 0.118 | 0.046 | 0.113 | 0.114 | 0.120 | 0.072 | 0.093 | 0.033 |
| avg_rating | 0.118 | 1.000 | -0.115 | 0.492 | 0.572 | 0.530 | 0.386 | 0.485 | -0.004 |
| helpfulness | 0.046 | -0.115 | 1.000 | -0.123 | -0.141 | -0.139 | -0.072 | -0.098 | -0.021 |
| num_of_enrolled | 0.113 | 0.492 | -0.123 | 1.000 | 0.938 | 0.943 | 0.352 | 0.635 | -0.126 |
| num_of_ratings | 0.114 | 0.572 | -0.141 | 0.938 | 1.000 | 0.984 | 0.384 | 0.606 | -0.215 |
| num_of_reviews | 0.120 | 0.530 | -0.139 | 0.943 | 0.984 | 1.000 | 0.341 | 0.569 | -0.201 |
| num_of_top_instructor_courses | 0.072 | 0.386 | -0.072 | 0.352 | 0.384 | 0.341 | 1.000 | 0.851 | 0.323 |
| num_of_top_instructor_leaners | 0.093 | 0.485 | -0.098 | 0.635 | 0.606 | 0.569 | 0.851 | 1.000 | 0.187 |
| posted_date | 0.033 | -0.004 | -0.021 | -0.126 | -0.215 | -0.201 | 0.323 | 0.187 | 1.000 |
Missing values
A simple visualization of nullity by column.
Nullity matrix is a data-dense display which lets you quickly visually pick out patterns in data completion.
Sample
| course_name | posted_date | crawling_date | Rating | avg_rating | num_of_ratings | helpfulness | Review_Text | num_of_reviews | num_of_enrolled | num_of_top_instructor_courses | num_of_top_instructor_leaners | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | foundations-of-cybersecurity | 20230729 | 20241130 | 5 | 4.8 | 27905 | 54 | The course is well paced and they get you comfortable with the topics even though we do not have any sort of prior exposure in this field. It is very good for the beginners who are new to this field | 5510 | 988223 | 325 | 11153139 |
| 1 | foundations-of-cybersecurity | 20230521 | 20241130 | 5 | 4.8 | 27905 | 44 | Information was well organized, easy to learn, and study. with frequent note writing, and some breaks . You can learn a good brief summary of what's to come, and what to research more in the future. | 5510 | 988223 | 325 | 11153139 |
| 2 | foundations-of-cybersecurity | 20230515 | 20241130 | 5 | 4.8 | 27905 | 41 | For a foundation course, this one was easy to understand, it explained all basic concepts in a fluid way and built up the base for the upcoming courses. I'm eager to move on to the other courses now. | 5510 | 988223 | 325 | 11153139 |
| 3 | foundations-of-cybersecurity | 20240109 | 20241130 | 5 | 4.8 | 27905 | 32 | I think this is a great start for anyone who is starting from absolute zero. I think that since I've been toying with the idea of getting into Cybersecurity for 2 years now, it was a great refresher! | 5510 | 988223 | 325 | 11153139 |
| 4 | foundations-of-cybersecurity | 20230519 | 20241130 | 5 | 4.8 | 27905 | 24 | Surprised by the quality of this course. repeating items so you learn by seeing definitions and concepts over and over again while using great analogy to make difficult concept understandable. | 5510 | 988223 | 325 | 11153139 |
| 5 | foundations-of-cybersecurity | 20231028 | 20241130 | 5 | 4.8 | 27905 | 21 | ! Cybersecurity is a critical and multifaceted field that involves protecting computer systems, networks, and data from various digital threats. Here is a review of the foundations of cybersecurity: | 5510 | 988223 | 325 | 11153139 |
| 6 | foundations-of-cybersecurity | 20230617 | 20241130 | 1 | 4.8 | 27905 | 18 | In the certificate , why am i not getting my name printed ? Instead "Coursera Learner"? | 5510 | 988223 | 325 | 11153139 |
| 7 | foundations-of-cybersecurity | 20230610 | 20241130 | 5 | 4.8 | 27905 | 9 | Dear Instructors of the Foundations of Cybersecurity Course at Google,I wanted to take a moment to express my deepest gratitude for the incredible learning experience you provided throughout the course. Your expertise, dedication, and passion for cybersecurity have truly made a lasting impact on my journey in this field.Firstly, allow me to introduce myself. My name is [Your Name], and I embarked on this course with a strong desire to deepen my understanding of cybersecurity and acquire the necessary skills to contribute meaningfully to the industry. As a lifelong learner, I am always seeking opportunities to expand my knowledge and stay updated with the latest developments in technology. This course seemed like the perfect fit to enhance my cybersecurity expertise.I chose to take this course because I firmly believe that cybersecurity is a critical aspect of our increasingly digital world. With the growing threats and vulnerabilities that organizations and individuals face, I wanted to equip myself with the knowledge and skills to make a tangible difference in securing digital systems and protecting sensitive information. The Foundations of Cybersecurity course seemed like the ideal starting point to build a strong foundation in this field.I am pleased to share that the course has exceeded my expectations in every way. From the very beginning, the course structure, content, and delivery were impeccable. The way you organized the modules and topics ensured a smooth learning journey, allowing me to grasp the fundamental concepts before diving into more advanced areas.What I truly loved about the course was the emphasis on practicality. The hands-on labs and simulations were invaluable in reinforcing the theoretical knowledge and providing a real-world perspective. Being able to apply the concepts in a practical setting not only enhanced my technical skills but also instilled confidence in my ability to tackle real-world cybersecurity challenges.Furthermore, the breadth of topics covered in the course was remarkable. From threat analysis to network security, encryption, incident response, and compliance, every aspect was explored in depth, providing a comprehensive understanding of the cybersecurity landscape. I appreciated the balance between theory and practical applications, as it allowed me to develop a holistic understanding of the subject matter.Your dedication as instructors was evident throughout the course. The quality of the course materials, including the informative videos, interactive quizzes, and additional readings, showcased the meticulous effort put into curating the content. Your ability to simplify complex concepts and communicate them effectively is commendable.The course has had a significant impact on my professional growth. Not only have I gained a solid understanding of cybersecurity fundamentals, but I have also acquired practical skills that I can immediately apply in real-world scenarios. The course has expanded my career prospects and opened doors to exciting opportunities in the cybersecurity field.I am truly grateful for the knowledge and insights I gained from this course. Your guidance and expertise have played a crucial role in shaping my cybersecurity journey. The impact you have made on my professional development is immeasurable.Thank you once again for your dedication, passion, and commitment to providing an exceptional learning experience. I am proud to have been a student in the Foundations of Cybersecurity course at Google, and I look forward to continuing my cybersecurity journey with the skills and knowledge I have acquired.With utmost appreciation,Jalal Saleem | 5510 | 988223 | 325 | 11153139 |
| 8 | foundations-of-cybersecurity | 20230520 | 20241130 | 3 | 4.8 | 27905 | 9 | The questions on the quizzes were often meaningless and the multiple choice answers were unbelievably vague and ill-defined to the point where no answer was entirely correct. | 5510 | 988223 | 325 | 11153139 |
| 9 | foundations-of-cybersecurity | 20230614 | 20241130 | 5 | 4.8 | 27905 | 8 | The instructors for the course did an amazing job at presenting all of the information to us! The course is informative and definitely will expand your knowledge specifically over Cybersecurity. | 5510 | 988223 | 325 | 11153139 |
| course_name | posted_date | crawling_date | Rating | avg_rating | num_of_ratings | helpfulness | Review_Text | num_of_reviews | num_of_enrolled | num_of_top_instructor_courses | num_of_top_instructor_leaners | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 149000 | java-programming-arrays-lists-data | 20200916 | 20241130 | 1 | 4.7 | 3168 | 0 | Not good | 515 | 160710 | 18 | 1071441 |
| 149001 | introduction-to-applied-cryptography | 20230905 | 20241130 | 5 | 4.6 | 66 | 0 | This course by Professor Keith Martin is a fast-paced introduction to the basics of cryptography and six important classes of applications.Even though the course is aimed at beginners, it contains a lot of material (e.g., on mobile telephony) that will be of interest to advanced students as well.What I appreciated most about the course was the broad perspective and the relaxed manner in which serious knowledge was taught. | 9 | 9693 | 2 | 83454 |
| 149002 | introduction-to-applied-cryptography | 20230516 | 20241130 | 5 | 4.6 | 66 | 0 | Thank you so much during this 4 weeks, i gained more knowledges about cryptography in this course. This course really help me to learn in flexiblw time. | 9 | 9693 | 2 | 83454 |
| 149003 | introduction-to-applied-cryptography | 20230516 | 20241130 | 5 | 4.6 | 66 | 0 | very useful and informative course. | 9 | 9693 | 2 | 83454 |
| 149004 | introduction-to-applied-cryptography | 20230903 | 20241130 | 5 | 4.6 | 66 | 0 | Challenging and very enratainent. | 9 | 9693 | 2 | 83454 |
| 149005 | introduction-to-applied-cryptography | 20231107 | 20241130 | 5 | 4.6 | 66 | 0 | very good education. | 9 | 9693 | 2 | 83454 |
| 149006 | introduction-to-applied-cryptography | 20241112 | 20241130 | 5 | 4.6 | 66 | 0 | good to learn | 9 | 9693 | 2 | 83454 |
| 149007 | introduction-to-applied-cryptography | 20231106 | 20241130 | 5 | 4.6 | 66 | 0 | It is Good | 9 | 9693 | 2 | 83454 |
| 149008 | introduction-to-applied-cryptography | 20240517 | 20241130 | 5 | 4.6 | 66 | 0 | excellent | 9 | 9693 | 2 | 83454 |
| 149009 | introduction-to-applied-cryptography | 20230929 | 20241130 | 5 | 4.6 | 66 | 0 | OK | 9 | 9693 | 2 | 83454 |